Coaches, Conestoga wagons, herds of livestock, pioneers on horseback, peddlers, soldiers, beggers--these and many others have crossed this bridge on the National Road since 1830. Escaping slaves sought shelter beneath it. Like many others on the road, the bridge was built with well-cut stone and good mortar in the shape of an "S" because it was easier to erect than one thrown straight across an oblique stream.